To install ISSM, untar ISSM-Ubuntu32.tar.gz 
You will get an ISSM directory. 

You then need to setup the following environment variable in your 
.bashrc or .cshrc: 

in your .bashrc: 
export ISSM_TIER='path_to_untarred_ISSM/bin'

or in your .cshrc: 
setenv ISSM_TIER 'path_to_untarred_ISSM'

Once this is done, fireup matlab from inside the ISSM directory: 
matlab -nojvm -r "startup;"
